具寬廣輸入電壓範圍之共振式功率轉換器｜國立臺灣科技大學博碩士論文系統

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研究生：	陳信嘉 Hsin-Chia Chen
論文名稱：	具寬廣輸入電壓範圍之共振式功率轉換器 Development of a Resonant Power Converter with Wide Input Voltage Range
指導教授：	黃仲欽 Jonq-Chin Hwang
口試委員:	葉勝年 Sheng-Nian Yeh 蕭弘清 Horng-Ching Hsiao 劉傳聖 Chuan-Sheng Liu
學位類別：	碩士 Master
系所名稱：	電資學院 - 電機工程系 Department of Electrical Engineering
論文出版年：	2013
畢業學年度：	101
語文別：	中文
論文頁數：	82
中文關鍵詞：	D型LLC共振式直流-直流功率轉換器、寬廣輸入電壓範圍
外文關鍵詞：	D tyep LLC resonant dc-dc power converter, wide input voltage range
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本文使用三個共振元件，分別為變壓器激磁電感Lm、電感Lr及外加電容Cr，組合成D型LLC共振式直流-直流功率轉換器。此共振式轉換器具有寬廣輸入電壓範圍、高切換頻率，因此直流電源供應器具有體積小及效率高的優點。文中考慮切換頻率範圍及電壓增益的限制，設計高頻變壓器中的激磁電感，使用分槽式變壓器所產生的漏電感代替共振電感，以減少磁性元件的使用，並以電路所需電壓放大率及共振電路品質因素取得最佳的變壓器匝數比。最後由共振電路電壓轉移函數，調整Lm、Lr、Cr參數，使能操作於寬廣輸入電壓範圍，並使一次側功率電晶體工作於零電壓切換模式。本文已完成共振式功率轉換器的電感、電容、功率元件之設計及控制電路的製作，系統的輸出功率65 W，輸出直流電壓19.5 V，輸入直流電壓 127 V至373 V，切換頻率為60 kHz至200 kHz，實測效率最高為 92.7 %。

The thesis aims to design a D type LLC resonant dc-dc power converter. The LLC circuit, consisting of transformer’s magnetization inductance (Lm), resonant inductor (Lr), and external capacitor (Cr), has the performance features of wide input voltage range, high switching frequency, high efficiency as well as small transformer size. For the purpose of reducing magnetic components, the magnetization inductance of the high-frequency transformer and resonant inductor, which is replaced by the leakage inductance, are designed by taking the switching frequency and the limitation of the voltage gain range into consideration. With regard to the resonant circuit, the required voltage magnification ratio and quality factor are analyzed first to derive the transformer turns ratio. Finally, the voltage transfer function of the resonant circuit is used to adjust Lm, Lr, and Cr for wide input voltage range and make primary side power MOSFET operate in zero voltage switching mode.
This thesis has completed the designs of parameter values, such as resonant converter inductances, capacitors, power components and the control circuit. Experimental evaluation yields output power and voltage of 65 W and 19.5 V, respectively, the input dc voltage range of 127 V ~ 373 V, switching frequency range of 60 kHz ~ 200 kHz, and measured system efficiency of 92.7 %.

中文摘要	..............................................I
Abstract	..............................................II
誌謝	..............................................III
目錄	..............................................IV
符號說明	..............................................VII
圖表索引	..............................................X

第一章 緒論	....................................1
1 研究動機及目的	....................................1
2 文獻探討	....................................2
3 本文的架構及特色	....................................3
4 本文大綱	....................................5

第二章 共振式轉換器的分析及設計.........................6
1前言	..............................................6
2共振式與非共振式轉換器比較	..........................6
2.1共振式轉換器切換功率元件的電壓、電流的分析........ 6
2.2 非共振式轉換器切換功率元件的電壓、電流的分析	......9
2.3共振式轉換器和非共振式轉換器比較	...............11
3共振式功率轉換器....................................12
4 LLC共振式D型電路轉換器分析	.........................15
4.1 電路架構	...................................15
4.2 不同操作頻率的分析	.........................17
4.3 動作狀態及對應電壓及電流分析	...............19
5 LLC共振式D型電路轉換器的轉移函數	...............28
5.1 LLC共振電路的穩態交流等效電路	...............28
5.2 等效電路轉移函數	.........................30
5.3 電壓增益函數的分析	.........................31
6 電路分析及結果	...................................33
6.1 電路品質因素調整	.........................33
6.2 變壓器激磁電感與漏電感比值的調整	...............34
7 結語	.............................................38

第三章 實體製作	...................................39
1前言	.............................................39
2 實作電路	...................................39
2.1 實作電路架構	...................................39
2.2 重要元件選用	...................................41
3 高效率磁性元件設計及繞製	.........................43
3.1 磁性元件外觀	...................................43
3.2 磁性元件規格設計	.........................43
3.3 高頻變壓器的繞線	.........................46
4 控制器的簡介	...................................47
5 控制器的分析	...................................48
5.1 回授控制電路	...................................48
5.2切換頻率與電壓增益曲線	.........................49
6 結語	.............................................51

第四章 實測及性能評估	.........................52
1前言	.............................................52
2 實測結果	...................................52
2.1輸出/輸入(輸出電壓/輸入電流)及效率	...............52
2.2元件溫度上升	...................................56
2.3 輸出電壓保持時間	.........................58
3 性能比較	...................................60
3.1與市售返馳式電源轉換器效率比較	...............60
3.2本文設計與一般LLC共振式轉換器在使用輸入電容的比較..61
4 結語	.............................................62

第五章 結論及建議	...................................63
1 結論	.............................................63
2 建議	.............................................64

參考文獻	65
附錄A本文實作電路佈局及外觀圖	67
附錄B本文使用零件列表	69

                                

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